The CIA had been monitoring his movements for months before the blast, which was triggered by Mossad agents in the Israeli capital of Tel Aviv, the officials told The Washington Post. CIA and Mossad agents had been working together to try to find the best place and time for a bomb to go off and kill Mughniyeh. The Mossad said Mughniyeh had a habit of taking walks by himself after dinner, and that targeting him during those walks would be the best way to get to him without harming anyone else.
The U.S. helped build the bomb and had tested it numerous times at a CIA facility in North Carolina.
The operation to kill Mugniyeh required greenlighting by the U.S.’s top authorities, and the attorney general and the national security advisor were among those who signed off on it.